AW: Progress Indicator IE in a PROGRESS Message

1 Sep 2000

      Even if Progress Indicator IE is optional in H.225.0 for sending, it shall
be mandatory to support (and act upon) if received. Otherwise, the rules we
established recently in v4 on the subject of controlling tones and
announcements provided from B (or from a Gateway) to a calling EP A would
not work well.

Note that there are some applications (like Call Park) where we use PROGRESS
message as the first end-to-end backward message which does not necessarily
require a Progress Indicator IE.

Regards,
Karl Klaghofer

-----Ursprüngliche Nachricht-----
Von: Francois Audet [mailto:audet@NORTELNETWORKS.COM]
Gesendet am: Donnerstag, 31. August 2000 19:37
An: ITU-SG16@mailbag.cps.intel.com
Betreff: Re: Progress Indicator IE in a PROGRESS Message

I kind of vaguely remember that being a bug in an early version of Q.931.
Pretty fuzzy however.

-----Original Message-----
From: Glen Freundlich [ mailto:ggf@AVAYA.COM <mailto:ggf@AVAYA.COM> ]
Sent: Thursday, August 31, 2000 7:06 AM
To: ITU-SG16@MAILBAG.INTEL.COM
Subject: Re: Progress Indicator IE in a PROGRESS Message

I don't recall intentionally leaving the Progress Indicator IE optional -
this
looks like a mistake to me.

Glen

Rich Bowen wrote:
...
This may have been an oversight -- I'm not sure a Progress message
without a Progress Indicator makes any sense.  Having only been
involved in this area for the last couple of years, I'll have to rely
on someone else to provide the original reason why this was made
optional.
This IE was also optional in H.225.0 v2.  However, section 7.2.2.23 of
the v4 draft indicates that it is mandatory for a gateway to forward
this IE from ISDN to H.323.
Rich Bowen
"Wuerfel, Randy P" wrote:
...
In reading through APC-1939 (draft H.225.0 V4) for the Portland meeting,
I
...
noticed that the Progress Indicator IE is shown as "O", optional, in the
...
...
PROGRESS message.  It is also shown this way in my copy of H.225.0 V3.
However, in Q.931 the Progress Indicator IE is mandatory in the PROGRESS
...
...
message.
Is there some reason why, for H.225.0 usage, the Progress Indicator IE
in
the PROGRESS message is optional rather than mandatory, or was this an
oversight?
Randy Wuerfel
Siemens Enterprise Networks
4900 Old Ironsides Drive                        Fax: (408) 492-4666
M/S 200                                 Tel: (408) 492-4375
P.O. Box 58075                          E-mail:
Randy.P.Wuerfel@icn.siemens.com
Santa Clara, CA 95052-8075
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
For help on this mail list, send "HELP ITU-SG16" in a message to
listserv@mailbag.intel.com
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
For help on this mail list, send "HELP ITU-SG16" in a message to
listserv@mailbag.intel.com
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
For help on this mail list, send "HELP ITU-SG16" in a message to
listserv@mailbag.intel.com

Klaghofer Karl ICN EN HC SE 81

tags

participants (1)